CARABIDAE. 7, 



rous puncture. Maxillas slender, inner lobe hooked at tip, spiu- 

 ulose within, outer lobe slender, biarticulate, palpi slender, the last 

 two joints equal. Mentum deeply einargiiiate and with an acute 

 tooth, ligula truncate and slightly broader at tip and bisetose, 

 the paraglos.siB free at tip but not longer, the palpi slender, second 

 joint longer than the terminal and plurisetose in front. Thorax 

 applied directly against the base of the elytra, sides with a single 

 setigerous puncture a little l)ehind the middle. Scutellum invisi- 

 ble. Elytra convex, margined at base, sides narrowly inflexed, 

 margin continuous. Prosternum rather widely separating the 

 coxte, prolonged and dilated behind them and completely cover- 

 ing the niesosternum ; the coxal cavities closed behind. Meso- 

 sternum in front vertical and carinate, with two fossae to receive 

 the under side of the anterior coxte. Metasternum short, epimera 

 not distinct, posterior coxas contiguous. Tibios finely spinulose 

 externally, the anterior slightly broader to tip, within obliquely 

 grooved, the inner spur above the apex. Tarsi slender. 



The males have one or two joints of the anterior tarsi dilated 

 and spongy pubescent beneath. 



The plurisetose second joint of the labial palpi is a character 

 of extremely rare occurrence in the present sub-family, but it is 

 the usual structure in Cicindelidte, and is very constant in Dryp- 

 tini and Harpalini of the sub-family HarpaliuEe. 



The species are found in wet sand, near the margin of streams 

 or ponds; four are found on the Pacific, five on the Atlantic slope 

 of the continent. 



Tribe III.— CYCHRIXI. 



Antennae slender, setaceous, four basal joints glabrous (two 

 only in Noniaretus), inserted under a feeble frontal ridge; first 

 joint long and often stout, third longer than second. Eyes round, 

 moderately prominent, distant beneath from the buccal opening. 

 Head more or less constricted, with one setigerous puncture above 

 the eye, neck often semiglobosc. Labrum deeply bifurcate. 

 Mandibles long and prominent, arcuate and acute at tip, and at 

 least bidentate within, and with no setigerous puncture exter- 

 nally. Ligula acute and bisetose at tip, the paraglossfB variable. 

 Labial palpi long, the second joint elongate, plurisetose in front, 

 last joint securiform and concave. Maxillae with inner lob« 

 slender, hooked at tip, ciliate or spinous within, the outer lobe 



